Hotel - family friendly but "nice" for adult dinner??

[Mandy21]

Its our 10th wedding anniversary this year, so want to go away for a night, but thought it would be really nice to go as a family (with the 3 children in tow) to kind of celebrate what we've achieved as a couple in those 10 years - a mainly happy family with three mostly gorgeous children .

Anyone know of a "nice" hotel that is child / family friendly (maybe swimming pool etc) with possibility of putting the children to bed with a baby listening service and having an adult-only dinner in a hotel restaurant that isn't over run with other people's children when we've gone to the effort of putting ours to bed.

We're in the NW but would drive a couple of hours in any direction.

Many thanks